Strange tuple errors in AP

One of the AP’s in my network has started displaying this strange error can anyone shed some light on the problem?

05:25:34 UT : Tue Nov 13 2012 : :Cannot Process CLM_TUPLECONFIGURATION_PTYPE since SM 0x00000 not found in LUID Database
01:47:52 UT : Thu Nov 15 2012 : :Cannot Process CLM_TUPLECONFIGURATION_PTYPE since SM 0x00000 not found in LUID Database
03:19:20 UT : Thu Nov 15 2012 : :Cannot Process CLM_TUPLECONFIGURATION_PTYPE since SM 0x00000 not found in LUID Database

I am seeing the same errors also now. It looks like I am having to reboot the AP frequently.